could insert
Regular verb: insert - inserted- inserted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could insert
you could insert
she could insert
we could insert
you could insert
they could insert 	I could be inserting
you could be inserting
she could be inserting
we could be inserting
you could be inserting
they could be inserting	I could have inserted
you could have inserted
she could have inserted
we could have inserted
you could have inserted
they could have inserted	I could have been inserting
you could have been inserting
she could have been inserting
we could have been inserting
you could have been inserting
they could have been inserting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't insert
you couldn't insert
she couldn't insert
we couldn't insert
you couldn't insert
they couldn't insert 	I couldn't be inserting
you couldn't be inserting
she couldn't be inserting
we couldn't be inserting
you couldn't be inserting
they couldn't be inserting	I couldn't have inserted
you couldn't have inserted
she couldn't have inserted
we couldn't have inserted
you couldn't have inserted
they couldn't have inserted	I couldn't have been inserting
you couldn't have been inserting
she couldn't have been inserting
we couldn't have been inserting
you couldn't have been inserting
they couldn't have been inserting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I insert?
could you insert?
could she insert?
could we insert?
could you insert?
could they insert? 	could I be inserting?
could you be inserting?
could she be inserting?
could we be inserting?
could you be inserting?
could they be inserting? 	could I have inserted?
could you have inserted?
could she have inserted?
could we have inserted?
could you have inserted?
could they have inserted? 	could I have been inserting?
could you have been inserting?
could she have been inserting?
could we have been inserting?
could you have been inserting?
could they have been inserting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I insert?
couldn't you insert?
couldn't she insert?
couldn't we insert?
couldn't you insert?
couldn't they insert? 	couldn't I be inserting?
couldn't you be inserting?
couldn't she be inserting?
couldn't we be inserting?
couldn't you be inserting?
couldn't they be inserting? 	couldn't I have inserted?
couldn't you have inserted?
couldn't she have inserted?
couldn't we have inserted?
couldn't you have inserted?
couldn't they have inserted? 	couldn't I have been inserting?
couldn't you have been inserting?
couldn't she have been inserting?
couldn't we have been inserting?
couldn't you have been inserting?
couldn't they have been inserting?